<!doctype html>
<html lang="zh-cmn-Hans">
<head>
    <meta charset="utf-8"/>
    <title>测试表单</title>
    <meta name="description" content="The Standard HTML5"/>
    <meta name="author" content="yinz"/>
    <!--[if lt IE 9]>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv.js"></script>
    <![endif]-->
    <link href="https://cdn.bootcss.com/bootstrap/4.1.0/css/bootstrap.min.css" rel="stylesheet" />
</head>
<body>
<div class="container">
    <form action="testjson" method="post">
        <div class="form-group">
            <label>测试json</label>
            <textarea class="form-control" name="jsonInput" rows="3" placeholder="输入json"></textarea>
        </div>
        <button type="submit" class="btn btn-primary">Submit</button>
    </form>
</div>
<script src="https://cdn.bootcss.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
</body>
</html>